Trade talks over Vincent Jackson failed between the Chargers and an unnamed team after the holdout wide receiver agreed on terms for a new contract but San Diego and the unnamed team couldn't agree on compensation, his agents said.

Agents Jonathan Feinsod and Neil Schwartz and the unnamed team agreed to terms on a contract Saturday after the team was given permission by San Diego to talk to Jackson.

Talks ended after the Chargers and the unnamed team reached an impasse over trade compensation. The exact compensation package San Diego is seeking is unknown, but the team does believe Jackson is a valuable player, so it's no surprise they want a lot in return for him.

"We had a one-year deal done and the team could not agree on draft choice compensation with the Chargers. Those are the facts," Feinsod told ESPN.com.

Asked if he thinks a trade can still get done with that team, Feinsod said: "You'd have to ask the Chargers that."

Schwartz told the San Diego Union-Tribune that "we have no idea" what the Chargers requested in return for trading Jackson.

San Diego's trade demands could decrease as Jackson's holdout continues or the Chargers' could let him sit out the season. Jackson has said he is prepared to sit out the entire season.

Jackson held out all of training camp and the preseason, seeking a five-year contract worth $50 million, with $30 million guaranteed, sources told ESPN.com senior writer John Clayton. San Diego is balking at giving him a new deal.

Jackson was deemed a restricted free agent due to the lack of a collective bargaining agreement in 2011. If he doesn't play in the final six games of the year, Jackson will not accrue a year toward free agency. In that case, if there is no lockout in 2011, he'll still be a restricted free agent when the 2010 season ends.

Jackson faces a three-game suspension from the NFL after two drunken driving arrests and then must sit three more games because San Diego placed him on the roster exempt list. If he is traded, the NFL Players' Association will probably try to get Jackson off the exempt list and get him on the field after his NFL suspension is served.

In August, San Diego gave Seattle permission to talk to Jackson, but the Seahawks could not come to an agreement with the receiver.

Bill Williamson covers the AFC West for ESPN.com. Information from The Associated Press contributed to this story.